About 65 million years ago, it is believed that a really large asteroid struck earth. The asteroid — measuring about 10 kms wide, hit earth, created a massive crater (a really, really, really, wide and deep pothole), and threw debris — dust and stone into the atmosphere. The sun was practically blocked out, leading to a massive climate change, and the death of over 75% of all the species on earth — including the dinosaurs. As per current evidence, dinosaurs had been around for about 230 million years, before they became extinct.
While frogs as a species, evolved some 200 million years ago, it is only when the dinosaurs went extinct, could they really multiply. This is the evidence found by a new study, which was authored by scientists working in the area of amphibians (animals that can live on both land and water), and reptiles (snakes, lizards, dinos and the rest). The researchers used fossil records to find out about how the world changed after that massive explosion.
“Frogs have been around for well over 200 million years, but this study shows it wasn’t until the extinction of the dinosaurs that we had this burst of frog diversity that resulted in the vast majority of frogs we see today,” study co-author David Blackburn, associate curator of amphibians and reptiles at the Florida Museum of Natural History on the University of Florida campus,
it is likely that without the dinosaurs around to snack on them, frogs could multiply without limit, leading them to be everywhere, in varied shapes and sizes
Can another asteroid strike earth ? scientists believe it can, in the not so distant future. And, this is one of the reasons why people like Elon Musk are trying to find human beings another planet (as a back up plan). It is expected, that in 2029, an asteroid called Apophis, will come very close to earth. Will it hit us, we don’t know.
“We can rule out a collision at the next closest approach with the Earth, but then the orbit will change in a way that is not fully predictable just now, so we cannot predict the behavior on a longer timescale,”
What do you think ?